package com.itheima.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");

        if (username == null || username.equals("")) {
            resp.setContentType("text/html;charset=UTF-8");

            resp.getWriter().write("输入的用户名有误，2秒后重新到达登录页面");

            resp.setHeader("Refresh","3;URL=/response/login.html");
        }

        HttpSession session = req.getSession();
        session.setAttribute("username",username);
        resp.sendRedirect("/stu/index.jsp");
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
